Retirement Benefits (Schedule of Amounts Recognized in Balance Sheets and Accumulated Other Comprehensive (Earnings) Losses) (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2022
Defined Benefit Pension Plan [Member]
Amounts recognized in the Consolidated Balance Sheets consist of:
Other non-current assets	$ 55,821	$ 43,339
Accrued liabilities	(1,166)	(1,084)
Other non-current liabilities	(35,564)	(30,595)
Net over/(under) funded status at end of year	19,091	11,660
Amounts recognized in accumulated other comprehensive (earnings) losses consist of:
Unrecognized net prior service cost (benefit)	3,709	3,264
Unrecognized net losses (gains)	(7,404)	680
Total amounts recognized	(3,695)	3,944	$ 13,300
Deferred taxes	(3,690)	(5,293)
Amounts recognized in accumulated other comprehensive (earnings)	(7,385)	(1,349)
Other Postretirement Benefit Plans [Member]
Amounts recognized in the Consolidated Balance Sheets consist of:
Accrued liabilities	(1,668)	(1,739)
Other non-current liabilities	(13,535)	(13,597)
Net over/(under) funded status at end of year	(15,203)	(15,336)
Amounts recognized in accumulated other comprehensive (earnings) losses consist of:
Unrecognized net losses (gains)	(5,260)	(6,412)
Total amounts recognized	(5,260)	(6,412)	(6,225)
Deferred taxes	1,009	1,292
Amounts recognized in accumulated other comprehensive (earnings)	(4,251)	(5,120)
United States [Member] \| Defined Benefit Pension Plan [Member]
Amounts recognized in the Consolidated Balance Sheets consist of:
Other non-current assets	39,148	29,172
Other non-current liabilities	(186)	(1,024)
Net over/(under) funded status at end of year	38,962	28,148
Amounts recognized in accumulated other comprehensive (earnings) losses consist of:
Unrecognized net prior service cost (benefit)	3,200	2,777
Unrecognized net losses (gains)	(2,749)	8,527
Total amounts recognized	451	11,304	18,297
Deferred taxes	(3,499)	(6,101)
Amounts recognized in accumulated other comprehensive (earnings)	(3,048)	5,203
Foreign Plan \| Defined Benefit Pension Plan [Member]
Amounts recognized in the Consolidated Balance Sheets consist of:
Other non-current assets	16,673	14,167
Accrued liabilities	(1,166)	(1,084)
Other non-current liabilities	(35,378)	(29,571)
Net over/(under) funded status at end of year	(19,871)	(16,488)
Amounts recognized in accumulated other comprehensive (earnings) losses consist of:
Unrecognized net prior service cost (benefit)	509	487
Unrecognized net losses (gains)	(4,655)	(7,847)
Total amounts recognized	(4,146)	(7,360)	$ (4,997)
Deferred taxes	(191)	808
Amounts recognized in accumulated other comprehensive (earnings)	$ (4,337)	$ (6,552)

Amount, after tax, of accumulated other comprehensive (income) loss for defined benefit plan, that has not been recognized in net periodic benefit cost (credit).

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